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Type: Posts; User: jmelson

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  1. Re: need cross reference on Beta M encoders ?

    I'm pretty sure from the docs I have that there are at least 32K and 64K encoders in the Beta series.
    I make a converter for the Fanuc serial encoders that converts them to look like a quadrature...
  2. Re: need cross reference on Beta M encoders ?

    Ah, I was looking at the wrong field in the part number. It seems that in the B275 field, the 75 specifies a (Beta)A64B encoder. Can anybody confirm this?
    Apparently, his encoders do NOT have...
  3. need cross reference on Beta M encoders ?

    Hello,

    I have a guy who needs a retrofit on a robot with Beta M motors. I need to make sure I know what encoders are on the motors.
    These are (Beta)M0.4, 0.5 and 1, part # A06B-0114-B275#0008,...
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    CHNC-I limit sensors

    We are retrofitting a 1986 CHNC-I that originally had the General Numerics control. The axis servos and drives were already replaced with Parker/MTS brushless motors/drives, and we now have those...
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    Re: spindle drive for CHNC-I

    I have a very hard to read pic of the plate, I don't see those words there. We will do the shorted test.

    The machine was NOT running. I'm not sure to trust the sellers 3rd person report of what...
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    Re: spindle drive for CHNC-I

    Right, the MOTOR will certainly not run off single phase. it needs a VFD of some sort. I was wondering if the Fanuc spindle DRIVE would accept single-phase power.
    But, I'm pretty sure the moroe is...
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    spindle drive for CHNC-I

    A friend just got a CHNC-I and we are planning a retrofit. The servo amps and axis motors have already been replaced by prior owner. It still has the original spindle motor (A06B-1006-B220#2000)...
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    Re: Need S20T arbor for drill chuck

    Levil doesn't sell a drill chuck for direct spindle mount. Geez! So, the best I could come up with was a small Jacobs chuck and a 3/8" straight shank to JT2 arbor, and mount that in a 3/8" collet...
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    Need S20T arbor for drill chuck

    We got a Levil mill that has the S20T spindle taper. We got a few ER16 collet chucks with it, but would like a drill chuck, too. Seems these are REALLY hard to find!

    Does anybody know where to...
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    Re: Got my Fanuc red cap servo motor running!

    OK, then, it really ought to work, then!

    Jon
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    Re: Got my Fanuc red cap servo motor running!

    32 KHz should work fine. 3.3 V will work OK, too, for the PWM signal. But, it appears to have PWM without a direction output. Our servo amps were designed for a sign-magnitude scheme. If used...
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    Re: Got my Fanuc red cap servo motor running!

    72 V DC will work, but you won't get full speed from the motor. This may not matter with a rotary axis. The motors usually have the voltage needed to achieve rated RPM on the nameplate, often 120 -...
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    Re: Got my Fanuc red cap servo motor running!

    No, you don't need 3-phase mains power. That is a totally separate issue from the motor using 3-phase power to move it. That 3-phase power is generated by the servo amp.

    So, there are a couple...
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    Re: new drive for Panasonic Minas S series motors

    GREAT! Now that you have a motor there with the right protocol, you can examine it at your leisure, and it proves
    your drives are OK, too.

    Jon
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    Re: new drive for Panasonic Minas S series motors

    Well, are you sure the drive supports the motor you are trying to connect? I've never worked with the Panasonic
    drives, I just got some motors cheap on eBay quite some years ago. I make my own...
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    Re: new drive for Panasonic Minas S series motors

    Glad you were able to figure this out! I didn't know about the reverse order of the complement bits, I didn't use those
    in the converter I made. I'm guessing bit 7 is a parity bit.

    Have you...
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    Re: new drive for Panasonic Minas S series motors

    OK, I'll try to get a scope on it this weekend. It is 5 V differential, as in 26LS31 / 26LS32 type drivers.

    Jon
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    Re: new drive for Panasonic Minas S series motors

    I'm a little vague on this, but my recollection is that the first 3 bits are the 3 commutation signals, then the next 3 bits are the
    complement of those signals. I don't recall, but I don't...
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    Re: new drive for Panasonic Minas S series motors

    It has been quite some time since I did this, so my memory is a bit vague. But, looking at the code I wrote, it appears the data
    is at 1 Mbit/second, and I think the first 3 bits are the Hall...
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    Re: new drive for Panasonic Minas S series motors

    I don't remember the exact format, but 10 bits total sounds right. I make a converter board to do this. It generates the classic Hall
    signals. See Pico Systems : Panasonic Encoder Converter...
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    Re: new drive for Panasonic Minas S series motors

    The MUMS - series motors only has commutation info, nothing else. The Minas may be a later generation. The scheme on the MUMS motors
    was just a serial stream of bytes, exactly identical to...
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    Of course. The .ini file is NOT executable or...

    Of course. The .ini file is NOT executable or understandable by Linux (the OS), it is a configuration file
    to LinuxCNC, and only makes sense to that program. So, you must run LinuxCNC and instruct...
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    The command is : linuxcnc ! You will then have...

    The command is : linuxcnc !
    You will then have to giude it to that .ini file you want to use by browsing
    through the directories.

    You can also feed it the path to a specific .ini file like this...
  24. No, because the Pico Systems Universal PWM...

    No, because the Pico Systems Universal PWM Controller does not accept step and direction signals. It
    reads the encoder position and reports that back to LinuxCNC, and then is sent a new PWM value...
  25. Well, if your drives need PWM and direction...

    Well, if your drives need PWM and direction signals, then you probably can use the Pico Systems universal
    PWM controller. See Pico Systems : 1. Universal PWM Controller [UPC] - $250.00
    for more...
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